In the 1980s, when computers were beginning to emerge in civil companies
as well as in military environments, it became increasingly necessary for
wireless and wired links, to carry not only the data of a single computer,
but complete data bundles, from multiple device simultaneously, often including speech and facsimile (fax) data.
Such devices are commonly known as bulk encryptors.
In the late 1990s and early 2000s, IP-based 1 computer networks started
taking over the role of proprietary data networks and digital telegraphy (Telex), in civil corporations as well as in the military domain.
Although it has taken a long time for the Defence Organisations to phase out
existing data networks, most of them are now fully relying on
encrypted IP-based networks.